Improvement in hanging- saws



.mwunggggggra www anni it 'www AMOS AlfE-LLKER, OF B AYl CITY MCHlG'AN.

Lette/rs Patent No. 85,294, dated December 29, 1868. l l

ROVEIVIENT IN HANGING SAWS.

The Schedule referred to in these Letters Patent and making part of thesame To whom it may concern:

Beit known that I, Amos Fnnnknn, of Bay City, in the county oi Bay, andState of Michigan, have invented a new and useful Improvement in Methodof lHanging Muley, Sash, or Gang-Saws; andil do declare that thefollowing is a true-andaccurate description thereof, reference being hadto the accompanying drawings, and to the letters of reference markedthereon,l and being a part of this specification.

Figure l is a perspective View of my' invention.

Figure 2 isa side elevation, showing the position of the pitmen. v

Figure 3 is a plan view of the rock-shaft.

Like letters indicate like parts in each figure.

The object of this invention is so to hang sash'v or gang-saws, forsawing logs, that they will have an oscillating motion, by means ofsuitable connections at top and bottom, that, in their upward motion,they will be thrown back from the cut, thereby allowing the sawdust tofall, and preventing it from obstructing the util- ;ity ofthe saw incutting, and so arranged, that, ,in the downward motion of the saw, itwill be thrown forward in the out against the log.l l

In order to accomplish this end, I construct a mill in the followingmanner, as shown in the drawings:

A is the main driving-pulley, driven by any suitable power, and attachedto the main shaft B, which runs in proper bearings, 0and to which issecured the crankwheel 1), provided with an appropriate wrist-pin, towhich is attached, in the usual way, by a proper strap,

the pitn'ian E, whose upper end is rigidly attached to the rocl-shait F,which.is secured, by suitable straps, G, to the saw-frame H.

To the frame l, isA secured the stationary shaft J, provided'withjoin-nais, upon which the straps K play.

These str'aps are secured to the horizontal pitmen L, which, by means ofsuitable straps, are, in turn, secured to and give motion to therock-shaft F and sawframe H. y

It will he noticed that the journals M upon the rockshai't, uponwhichthe straps of the horizontal pitmen play, are not turned upon a trueline with the centre of said rock-shaft, but are ecoentrics, oreccentric-j ournais, and are designed to assist in extending the sweepof the lower end oi' the saw in its forward and backward motion.

To the frame N is secured another stationary shaft, E, provided withsuitable` journals, upon which play suitable straps, which secure theouter ends of the horizontal pitmen O, the other ends of which aresecured, by other straps, to the stationary shaft Rwhich, in

turn, is rigidly secured to the top ofthe frame lH, and

controls the. motion of the upper end ofthe saw.

By this method of suspending or hanging saws, the use of slides andcross-heads, or their equivalents, is entirely avoided, therebysaving'much friction, and enabling the saws to be run with inuch greaterrapidity than when operated in anyother manner.

It will be seen that the upperhorizontal lpitmen are somewhat shortened,so lthat at no time will the saw stand perpendicular, but will, at alltimes, be inclined towards the direction of its cut, by Which means thesawdust is more eii'ectually allowed to drop out of the cut.

By this method of obtaining both a reciprocating and oscillating motionof the saw, friction is saved, and speed gained.

The outer end s oi' all the horizontal pitmen being held at a fixedpoint, their inner ends are compelled to describe the arc of a circle intheir motion, and give the same motion to the ends of the frame H, towhich the saw is attached.

The rock-shaft and stationary shafts may be legnthi by Letters Patent,is-

'.lhe arrangement of the horizontal pitman O, sawframe H, rock-shaft E,having eccentric-journals M, pitmeu E and I1, and stationary shafts Jand P, all arranged to operate the saw-frame H, substantially and forthe purposes set forth.

AMOS FELLKER.

Witnesses:l

H. F. Enunfrs, CHARLES A. W. RICE.

